The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Wednesday, May 30, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 31 May, 2012

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined: 412220
Prefixes after maximum aggregation: 174442
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 200499
Total ASes present in the Internet Routing Table: 41155
Prefixes per ASN: 10.02
Origin-only ASes present in the Internet Routing Table: 33236
Origin ASes announcing only one prefix: 15653
Transit ASes present in the Internet Routing Table: 5501
Transit-only ASes present in the Internet Routing Table: 134
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 412
Unregistered ASNs in the Routing Table: 137
Number of 32-bit ASNs allocated by the RIRs: 2765
Number of 32-bit ASNs visible in the Routing Table: 2418
Prefixes from 32-bit ASNs in the Routing Table: 6155
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 114
Number of addresses announced to Internet: 2559553072
Equivalent to 152 /8s, 143 /16s and 174 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.1
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 175627

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes: 100653
Total APNIC prefixes after maximum aggregation: 32481
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 97102
Unique aggregates announced from the APNIC address blocks: 39985
APNIC Region origin ASes present in the Internet Routing Table: 4697
APNIC Prefixes per ASN: 20.67
APNIC Region origin ASes announcing only one prefix: 1247
APNIC Region transit ASes present in the Internet Routing Table: 735
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 223
Number of APNIC addresses announced to Internet: 647503168
Equivalent to 38 /8s, 152 /16s and 29 /24s
Percentage of available APNIC address space announced: 82.1

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8,
49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8,
106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
123/8, 124/8, 125/8, 126/8, 133/8, 175/8, 180/8,
182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8,
219/8, 220/8, 221/8, 222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes: 151502
Total ARIN prefixes after maximum aggregation: 76863
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121950
Unique aggregates announced from the ARIN address blocks: 51225
ARIN Region origin ASes present in the Internet Routing Table: 15133
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1597
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 816653760
Equivalent to 48 /8s, 173 /16s and 37 /24s
Percentage of available ARIN address space announced: 65.1

ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153
3354-4607, 4865-5119, 5632-6655, 6912-7466
7723-8191, 10240-12287, 13312-15359, 16384-17407
18432-20479, 21504-23551, 25600-26591,
26624-27647, 29696-30719, 31744-33791
35840-36863, 39936-40959, 46080-47103
53248-55295, 393216-394239
ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8,
12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8,
20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8,
29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8,
40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8,
53/8, 54/8, 55/8, 56/8, 57/8, 63/8, 64/8,
65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8,
72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8,
98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 173/8,
174/8, 184/8, 199/8, 204/8, 205/8, 206/8, 207/8,
208/8, 209/8, 214/8, 215/8, 216/8,

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes: 102482
Total RIPE prefixes after maximum aggregation: 54552
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94534
Unique aggregates announced from the RIPE address blocks: 59356
RIPE Region origin ASes present in the Internet Routing Table: 16595
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 8060
RIPE Region transit ASes present in the Internet Routing Table: 2655
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1602
Number of RIPE addresses announced to Internet: 515044104
Equivalent to 30 /8s, 178 /16s and 243 /24s
Percentage of available RIPE address space announced: 83.0

RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631
6656-6911, 8192-9215, 12288-13311, 15360-16383
20480-21503, 24576-25599, 28672-29695
30720-31743, 33792-35839, 38912-39935
40960-45055, 47104-52223, 56320-58367
196608-198655
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8,
83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8,
90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 41782
Total LACNIC prefixes after maximum aggregation: 8289
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41936
Unique aggregates announced from the LACNIC address blocks: 20573
LACNIC Region origin ASes present in the Internet Routing Table: 1597
LACNIC Prefixes per ASN: 26.26
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 305
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 571
Number of LACNIC addresses announced to Internet: 101626760
Equivalent to 6 /8s, 14 /16s and 179 /24s
Percentage of available LACNIC address space announced: 67.3

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9440
Total AfriNIC prefixes after maximum aggregation: 2176
AfriNIC Deaggregation factor: 4.34
Prefixes being announced from the AfriNIC address blocks: 7462
Unique aggregates announced from the AfriNIC address blocks: 2192
AfriNIC Region origin ASes present in the Internet Routing Table: 544
AfriNIC Prefixes per ASN: 13.72
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 122
Average AfriNIC Region AS path length visible: 4.5
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31838208
Equivalent to 1 /8s, 229 /16s and 208 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2637 11113 1122 Korea Telecom (KIX)
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1667 301 86 TPG Internet Pty Ltd
4755 1577 386 156 TATA Communications formerly
9829 1298 1085 28 BSNL National Internet Backbo
7552 1172 1062 11 Vietel Corporation
9583 1156 87 503 Sify Limited
4808 1107 2050 317 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 BHARTI Airtel Ltd.

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3411 3807 193 bellsouth.net, inc.
7029 3338 986 159 Windstream Communications Inc
18566 2092 382 181 Covad Communications
1785 1909 681 131 PaeTec Communications, Inc.
20115 1645 1569 619 Charter Communications
22773 1617 2911 121 Cox Communications, Inc.
4323 1570 1043 384 Time Warner Telecom
30036 1415 262 753 Mediacom Communications Corp
7018 1225 10031 822 AT&T WorldNet Services
7011 1188 317 681 Citizens Utilities

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1693 544 16 Corbina telecom
2118 1302 97 14 EUnet/RELCOM Autonomous Syste
34984 699 188 172 BILISIM TELEKOM
12479 696 679 71 Uni2 Autonomous System
31148 683 37 9 FreeNet ISP
20940 660 216 514 Akamai Technologies European
6830 655 2215 426 UPC Distribution Services
8551 579 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 472 2108 407 TDC Tele Danmark

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
10620 1920 340 201 TVCABLE BOGOTA
28573 1896 1180 57 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1483 3065 333 UniNet S.A. de C.V.
7303 1435 901 191 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 691 73 94 Telconet S.A
11172 644 91 73 Servicios Alestra S.A de C.V
3816 585 247 89 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET S.A.

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8452 1370 958 13 TEDATA
24863 846 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 171 666 83 MTN Network Solutions
15706 165 32 6 Sudatel Internet Exchange Aut
29571 157 15 16 Ci Telecom Autonomous system

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3411 3807 193 bellsouth.net, inc.
7029 3338 986 159 Windstream Communications Inc
4766 2637 11113 1122 Korea Telecom (KIX)
18566 2092 382 181 Covad Communications
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
10620 1920 340 201 TVCABLE BOGOTA
1785 1909 681 131 PaeTec Communications, Inc.
28573 1896 1180 57 NET Servicos de Comunicao S.A
8402 1693 544 16 Corbina telecom
7545 1667 301 86 TPG Internet Pty Ltd

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
7029 3338 3179 Windstream Communications Inc
18566 2092 1911 Covad Communications
17974 1924 1844 PT TELEKOMUNIKASI INDONESIA
28573 1896 1839 NET Servicos de Comunicao S.A
1785 1909 1778 PaeTec Communications, Inc.
10620 1920 1719 TVCABLE BOGOTA
8402 1693 1677 Corbina telecom
7545 1667 1581 TPG Internet Pty Ltd
4766 2637 1515 Korea Telecom (KIX)
22773 1617 1496 Cox Communications, Inc.

Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

Complete listing at http://thyme.rand.apnic.net/current/data-dsua

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
5.45.176.0/21 29141 Bradler & Krantz, Bochum, Ger
5.53.32.0/19 30783 Rased Maral Ava Jonoob JSC
5.53.120.0/21 51012 LLC "UralPromService"
5.56.144.0/20 31027 Nianet is a Danish Internet S
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg

Complete listing at http://thyme.rand.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:19 /9:13 /10:29 /11:81 /12:236
/13:462 /14:833 /15:1504 /16:12299 /17:6312 /18:10623
/19:20808 /20:29485 /21:30915 /22:40560 /23:38507 /24:215756
/25:1224 /26:1454 /27:824 /28:170 /29:67 /30:17
/31:0 /32:22

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

ASN No of nets Total ann. Description
7029 2998 3338 Windstream Communications Inc
6389 2130 3411 bellsouth.net, inc.
18566 2041 2092 Covad Communications
10620 1734 1920 TVCABLE BOGOTA
8402 1671 1693 Corbina telecom
30036 1356 1415 Mediacom Communications Corp
6503 1288 1533 AVANTEL, S.A.
8452 1171 1370 TEDATA
11492 1150 1187 Cable One
7011 1073 1188 Citizens Utilities

Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

1:554 2:740 4:13 5:38 6:3 8:421
12:2015 13:1 14:617 15:12 16:3 17:5
20:23 23:174 24:1776 27:1316 31:981 32:56
33:2 34:2 36:8 37:636 38:812 40:122
41:3259 42:138 44:3 46:1426 47:3 49:449
50:553 52:13 54:12 55:8 56:3 57:33
58:960 59:496 60:254 61:1218 62:1014 63:2004
64:4246 65:2248 66:4467 67:1995 68:1155 69:3174
70:933 71:493 72:1821 74:2598 75:494 76:329
77:952 78:959 79:491 80:1221 81:939 82:661
83:545 84:495 85:1216 86:438 87:904 88:347
89:1714 90:292 91:4872 92:540 93:1365 94:1556
95:1154 96:362 97:313 98:865 99:38 100:7
101:208 103:1113 106:103 107:185 108:312 109:1331
110:753 111:923 112:415 113:607 114:634 115:843
116:936 117:726 118:914 119:1236 120:354 121:700
122:1667 123:1105 124:1391 125:1257 128:550 129:195
130:246 131:631 132:289 133:22 134:247 135:62
136:215 137:241 138:358 139:185 140:497 141:252
142:415 143:574 144:535 145:72 146:503 147:284
148:775 149:306 150:193 151:175 152:469 153:172
154:12 155:404 156:222 157:381 158:184 159:557
160:345 161:265 162:343 163:190 164:604 165:400
166:593 167:469 168:863 169:126 170:783 171:132
172:2 173:1748 174:583 175:432 176:545 177:809
178:1396 180:1223 181:88 182:1042 183:227 184:504
185:1 186:2311 187:1100 188:1290 189:1821 190:5554
192:6008 193:5564 194:4524 195:3416 196:1241 197:147
198:3662 199:4710 200:5893 201:1933 202:8620 203:8586
204:4342 205:2532 206:2773 207:2806 208:4060 209:3617
210:2760 211:1542 212:2028 213:1931 214:860 215:96
216:5110 217:1553 218:552 219:315 220:1238 221:565
222:315 223:357

End of report
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